CN103436879B - A kind of preparation method of laser melting coating strengthening spreader - Google Patents
A kind of preparation method of laser melting coating strengthening spreader Download PDFInfo
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- CN103436879B CN103436879B CN201310325659.XA CN201310325659A CN103436879B CN 103436879 B CN103436879 B CN 103436879B CN 201310325659 A CN201310325659 A CN 201310325659A CN 103436879 B CN103436879 B CN 103436879B
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Abstract
A preparation method for laser melting coating strengthening spreader, after it mainly machines by spreader drawing common middle low-carbon alloy structural steel bar, reduces 0.5mm by the part of contact aluminium liquid by size and continues processing, preparing metal ceramal powder, its chemical composition mass percent is: C0.1 ~ 0.35%, Al0.6 ~ 1.2%, Si0.7 ~ 0.9%, Cr25 ~ 29%, Co55 ~ 62%, Yb2.1 ~ 2.8%, W4.3 ~ 4.9%, surplus is Fe, adopt pneumatic or gravity toward powder feeding on spreader, utilize the beam flying of high-power semiconductor laser high-energy, make to carry the powdered alloy that puts in place and spreader substrate surface metal that quick metallurgical reaction occurs, stress relief annealing is carried out to the spreader after above-mentioned laser melting coating, temperature is 300 ~ 500 DEG C, be incubated 2 ~ 4 hours, then furnace cooling, the precision work of alloy enhanced layer is completed by numerically-controlled machine.Preparation technology of the present invention is simple, pollution-free, and the strengthening spreader life-span of preparation is long, and cost is low.
Description
Technical field
The present invention relates to the mechanical workout of aluminium wheels mould, particularly a kind of preparation method of spreader.
Background technology
In casting aluminium alloy wheel hub process, the life-span of H13 die steel spreader is generally about 2500, approximately produces 10 days needs and changes, because spreader life problems makes a big impact to production efficiency in production.And, because H13 steel is expensive, frequent owing to changing in actual use, add enterprise cost.Find that a kind of life-span is long, performance good, cheap spreader and preparation method thereof, and greatly will improve aluminium alloy wheel hub enterprise productivity effect to the strengthening spreader that casting whole process, wheel hub quality all make moderate progress, reduce enterprise cost, save noble metal.
In recent years, for the work-ing life of how to improve spreader, a lot of engineering technical personnel have carried out a lot of improvement from aspects such as design, selection, assemblings, as improved heat treatment mode, selecting specialty alloy materials etc.But, find in actual use, although the spreader life-span increases after improving, but cost is very high, cost performance is low, and in high temperature aluminum pendular ring border, ubiquity corrosive wear is serious, just loses efficacy far below life, reduces production efficiency and the reliability of wheel hub casting.
Summary of the invention
The object of the present invention is to provide the preparation method that a kind of technique is simple, with low cost, laser melting coating that is that can improve spreader corrosion-proof wear and work-ing life strengthens spreader.The present invention, mainly on middle low-carbon alloy structural steel base material, strengthens spreader by laser melting coating cermet powder technology is obtained.
Preparation method of the present invention is as follows:
(1) common middle low-carbon alloy structural steel bar is processed by spreader drawing, part for noncontact aluminium liquid does not carry out any process, the part of contact aluminium liquid is reduced 0.5mm by size and continues processing, after machining, for preventing machined surface reflective, use the part of prepared Chinese ink blacking contact aluminium liquid, and dry;
(2) preparing metal ceramal powder, the chemical composition mass percent of described cermet powder is: C0.1 ~ 0.35%, Al0.6 ~ 1.2%, Si0.7 ~ 0.9%, Cr25 ~ 29%, Co55 ~ 62%, Yb2.1 ~ 2.8%, W4.3 ~ 4.9%, surplus are Fe, and the granularity of its powder is 120 ~ 325 orders;
(3) with three-dimensional meal mixer, above-mentioned cermet powder is mixed 2 hours, mix;
(4) be fixed on high-power semiconductor laser machining tool by the above-mentioned spreader processed, drive spreader to rotate by chuck, adopt pneumatic or gravity mode toward the powder feeding of spreader blacking part, powder layer thickness is 1.2mm;
(5) the high-energy light beam utilizing high power semiconductor lasers to export, the cermet powder put in place is carried in scanning, semiconductor laser power P=1000 ~ 3800W, rectangular light spot 2 × 8mm, overlapping rate 30 ~ 50%, scan velocity V=300 ~ 720mm/min, there is quick metallurgical reaction in the substrate surface metal making cermet powder contact aluminium liquid part with spreader, obtains the thick high temperature corrosion and wear resistance alloy enhanced layer of uniform 1.0mm;
(6) carry out stress relief annealing to the spreader after above-mentioned laser melting coating, temperature is 300 ~ 500 DEG C, is incubated 2 ~ 4 hours, then furnace cooling;
(7) digital controlled lathe is adopted to carry out precision work to the spreader cladding part after above-mentioned anneal, cut cladding layer 0.5mm, the thick alloy enhanced layer of 0.5mm is formed at spreader contact aluminium liquid part surface, and alloy strengthening layer carries out surface quality and form and position tolerance inspection, be delivered for use after qualified, cladding is repeated to the product that there is surface imperfection, then precision work.
Under semiconductor laser exports the effect of high-energy light beam, there is quick metallurgical reaction in cermet powder and spreader substrate surface metal, under the cooling effect of normal temperature metal around, obtain that crystal grain is tiny, dense structure is with the alloy enhanced layer of ceramic particle reinforced phase, obtain strengthening spreader, significantly improve the work-ing life of spreader.
The present invention compared with prior art tool has the following advantages:
1, simple, the energy-conserving and environment-protective of present invention process, pollution-free.
In the outside surface alloy enhanced layer of the spreader contact aluminium liquid part 2, adopting the inventive method to obtain, Dispersed precipitate a large amount of carbide ceramics hard phase, there is desirable anticorrosive, antiscour wear and tear and resistance to elevated temperatures, achieve the strengthening of spreader, extend work-ing life, reduce enterprise cost.
3, strengthening spreader more traditional H13 material in the work-ing life spreader adopting the present invention to obtain improves more than 2 times.
Accompanying drawing explanation
Fig. 1 is that the master after spreader machining completes looks diagrammatic cross-section.
Fig. 2 is that the master after spreader laser melting coating of the present invention strengthening looks diagrammatic cross-section.
In figure: 1 is spreader noncontact aluminium liquid part for spreader contact aluminium liquid part, 2 be alloy enhanced layer, 3.
Embodiment
Embodiment 1:
As shown in Figure 1, process by spreader drawing 35CrMo bar, the part 3 for noncontact aluminium liquid does not carry out any process, the part 1 of contact aluminium liquid is reduced 0.5mm by size, continues processing, after machining, use the part of prepared Chinese ink blacking contact aluminium liquid, and dry; Adopt mechanical mix techniques the cermet powder prepared in proportion to be put into three-dimensional meal mixer and fully mix 2 hours, the chemical composition mass percent of cermet powder is: C0.35%, Al0.62%, Si0.7%, Cr25%, Co55%, Yb2.1%, W4.3%, surplus is Fe; Be fixed on by spreader on high-power semiconductor laser machining tool, drive spreader to rotate by chuck, adopt pneumatic toward the powder feeding of spreader blacking part, powder layer thickness is 1.2mm; The high-energy light beam utilizing high power semiconductor lasers to export, the cermet powder put in place is carried in scanning, semiconductor laser power P=3800W, rectangular light spot 2 × 8mm, overlapping rate 30%, scan velocity V=720mm/min, there is quick metallurgical reaction in the substrate surface metal making cermet powder contact aluminium liquid part with spreader, obtains uniform 1.0mm thick high temperature corrosion and wear resistance alloy enhanced layer 2(as shown in Figure 2).Carry out stress relief annealing to the spreader after above-mentioned laser melting coating, temperature is 300 DEG C, is incubated 3 hours, then furnace cooling; Adopt digital controlled lathe to carry out precision work to spreader cladding part again, cut cladding layer 0.5mm, form the thick alloy enhanced layer of 0.5mm at spreader contact aluminium liquid part surface.
Embodiment 2:
Process by spreader drawing 42CrMo bar, the part for noncontact aluminium liquid does not carry out any process, the part of contact aluminium liquid is reduced 0.5mm by size, continues processing, after machining, uses the part of prepared Chinese ink blacking contact aluminium liquid, and dries; Adopt mechanical mix techniques the cermet powder prepared in proportion to be put into three-dimensional meal mixer and fully mix 2 hours, the chemical composition mass percent of cermet powder is: C0.25%, Al0.72%, Si0.7%, Cr29%, Co59%, Yb2.2%, W4.3%, surplus is Fe; Be fixed on by spreader on high-power semiconductor laser machining tool, drive spreader to rotate by chuck, adopt gravity toward the powder feeding of spreader blacking part, powder layer thickness is 1.2mm; The high-energy light beam utilizing high power semiconductor lasers to export, the cermet powder put in place is carried in scanning, semiconductor laser power P=1400W, rectangular light spot 2 × 8mm, overlapping rate 35%, scan velocity V=400mm/min, there is quick metallurgical reaction in the substrate surface metal making cermet powder contact aluminium liquid part with spreader, obtain the thick high temperature corrosion and wear resistance alloy enhanced layer of uniform 1.0mm, stress relief annealing is carried out to the spreader after above-mentioned laser melting coating, temperature is 300 DEG C, be incubated 3 hours, then furnace cooling; Adopt digital controlled lathe to carry out precision work to spreader cladding part again, cut cladding layer 0.5mm, form the thick alloy enhanced layer of 0.5mm at spreader contact aluminium liquid part surface.
Embodiment 3:
Process by spreader drawing 35CrMoSi bar, the part for noncontact aluminium liquid does not carry out any process, the part of contact aluminium liquid is reduced 0.5mm by size, continues processing, after machining, uses the part of prepared Chinese ink blacking contact aluminium liquid, and dries; Adopt mechanical mix techniques the cermet powder prepared in proportion to be put into three-dimensional meal mixer and fully mix 2 hours, the chemical composition mass percent of cermet powder is: C0.25%, Al1.2%, Si0.8%, Cr28%, Co56%, Yb2.3%, W4.6%, surplus is Fe; Be fixed on by spreader on high-power semiconductor laser machining tool, drive spreader to rotate by chuck, adopt pneumatic mode toward the powder feeding of spreader blacking part, powder layer thickness is 1.2mm; The high-energy light beam utilizing high power semiconductor lasers to export, the cermet powder put in place is carried in scanning, semiconductor laser power P=1800W, rectangular light spot 2 × 8mm, overlapping rate 50%, scan velocity V=650mm/min, there is quick metallurgical reaction in the substrate surface metal making cermet powder contact aluminium liquid part 1 with spreader, obtain the thick high temperature corrosion and wear resistance alloy enhanced layer of uniform 1.0mm, stress relief annealing is carried out to the spreader after above-mentioned laser melting coating, temperature is 300 DEG C, be incubated 4 hours, then furnace cooling; Adopt digital controlled lathe to carry out precision work to spreader cladding part again, cut cladding layer 0.5mm, form the thick alloy enhanced layer of 0.5mm at spreader contact aluminium liquid part surface.
Embodiment 4:
Process by spreader drawing 35CrMo bar, the part for noncontact aluminium liquid does not carry out any process, the part of contact aluminium liquid is reduced 0.5mm by size, continues processing, after machining, uses the part of prepared Chinese ink blacking contact aluminium liquid, and dries; Adopt mechanical mix techniques the cermet powder prepared in proportion to be put into three-dimensional meal mixer and fully mix 2 hours, the chemical composition mass percent of cermet powder is: C0.3%, Al1.0%, Si0.85%, Cr27%, Co60%, Yb2.8%, W4.9%, surplus is Fe; Spreader is fixed on high-power semiconductor laser machining tool, drives spreader to rotate by chuck; Adopt pneumatic mode toward the powder feeding of spreader blacking part, powder layer thickness is 1.2mm; The high-energy light beam utilizing high power semiconductor lasers to export, the cermet powder put in place is carried in scanning, semiconductor laser power P=1800W, rectangular light spot 2 × 8mm, overlapping rate 40%, scan velocity V=450mm/min, there is quick metallurgical reaction in the substrate surface metal making cermet powder contact aluminium liquid part with spreader, obtain the thick high temperature corrosion and wear resistance alloy enhanced layer of uniform 1.0mm, stress relief annealing is carried out to the spreader after above-mentioned laser melting coating, temperature is 450 DEG C, be incubated 2 hours, then furnace cooling; Adopt digital controlled lathe to carry out precision work to spreader cladding part again, cut cladding layer 0.5mm, form the thick alloy enhanced layer of 0.5mm at spreader contact aluminium liquid part surface.
Embodiment 5:
Process by spreader drawing 42CrMo bar, the part for noncontact aluminium liquid does not carry out any process, the part of contact aluminium liquid is reduced 0.5mm by size, continues processing, after machining, uses the part of prepared Chinese ink blacking contact aluminium liquid, and dries; Adopt mechanical mix techniques the cermet powder prepared in proportion to be put into three-dimensional meal mixer and fully mix 2 hours, the chemical composition mass percent of cermet powder is: C0.25%, Al0.82%, Si0.9%, Cr29%, Co62%, Yb2.8%, W4.3%, surplus is Fe; Be fixed on by spreader on high-power semiconductor laser machining tool, drive spreader to rotate by chuck, adopt gravity mode toward the powder feeding of spreader blacking part, powder layer thickness is 1.2mm; The high-energy light beam utilizing high power semiconductor lasers to export, the cermet powder put in place is carried in scanning, semiconductor laser power P=2000W, rectangular light spot 2 × 8mm, overlapping rate 30%, scan velocity V=480mm/min; There is quick metallurgical reaction in the substrate surface metal making cermet powder contact aluminium liquid part with spreader, obtain the thick high temperature corrosion and wear resistance alloy enhanced layer of uniform 1.0mm, stress relief annealing is carried out to the spreader after above-mentioned laser melting coating, temperature is 350 DEG C, be incubated 3 hours, then furnace cooling; Adopt digital controlled lathe to carry out precision work to spreader cladding part again, cut cladding layer 0.5mm, form the thick alloy enhanced layer of 0.5mm at spreader contact aluminium liquid part surface.
Embodiment 6:
Process by spreader drawing 35CrMo bar, the part for noncontact aluminium liquid does not carry out any process, the part of contact aluminium liquid is reduced 0.5mm by size, continues processing, after machining, uses the part of prepared Chinese ink blacking contact aluminium liquid, and dries; Adopt mechanical mix techniques the cermet powder prepared in proportion to be put into three-dimensional meal mixer and fully mix 2 hours, the chemical composition mass percent of cermet powder is: C0.35%, Al0.6%, Si0.7%, Cr26%, Co55%, Yb2.8%, W4.9%, surplus is Fe; Be fixed on by spreader on high-power semiconductor laser machining tool, drive spreader to rotate by chuck, adopt gravity mode toward the powder feeding of spreader blacking part, powder layer thickness is 1.2mm; The high-energy light beam utilizing high power semiconductor lasers to export, the cermet powder put in place is carried in scanning, semiconductor laser power P=1000W, rectangular light spot 2 × 8mm, overlapping rate 35%, scan velocity V=300mm/min, there is quick metallurgical reaction in the substrate surface metal making cermet powder contact aluminium liquid part with spreader, obtain the thick high temperature corrosion and wear resistance alloy enhanced layer of uniform 1.0mm, stress relief annealing is carried out to the spreader after above-mentioned laser melting coating, temperature is 300 DEG C, be incubated 4 hours, then furnace cooling; Adopt digital controlled lathe to carry out precision work to spreader cladding part again, cut cladding layer 0.5mm, form the thick alloy enhanced layer of 0.5mm at spreader contact aluminium liquid part surface.
Embodiment 7:
Process by spreader drawing 40CrMo bar, the part for noncontact aluminium liquid does not carry out any process, the part of contact aluminium liquid is reduced 0.5mm by size, continues processing, after machining, uses the part of prepared Chinese ink blacking contact aluminium liquid, and dries; Adopt mechanical mix techniques the cermet powder prepared in proportion to be put into three-dimensional meal mixer and fully mix 2 hours, the chemical composition mass percent of cermet powder is: C0.28%, Al1.2%, Si0.9%, Cr29%, Co59%, Yb2.6%, W4.6%, surplus is Fe; Be fixed on by spreader on high-power semiconductor laser machining tool, drive spreader to rotate by chuck, adopt pneumatic mode toward the powder feeding of spreader blacking part, powder layer thickness is 1.2mm; The high-energy light beam utilizing high power semiconductor lasers to export, the cermet powder put in place is carried in scanning, semiconductor laser power P=2400W, rectangular light spot 2 × 8mm, overlapping rate 30%, scan velocity V=720mm/min, there is quick metallurgical reaction in the substrate surface metal making cermet powder contact aluminium liquid part with spreader, obtain the thick high temperature corrosion and wear resistance alloy enhanced layer of uniform 1.0mm, stress relief annealing is carried out to the spreader after above-mentioned laser melting coating, temperature is 300 DEG C, be incubated 3 hours, then furnace cooling; Adopt digital controlled lathe to carry out precision work to spreader cladding part again, cut cladding layer 0.5mm, form the thick alloy enhanced layer of 0.5mm at spreader contact aluminium liquid part surface.
Embodiment 8:
Process by spreader drawing 35CrMo bar, the part for noncontact aluminium liquid does not carry out any process, the part of contact aluminium liquid is reduced 0.5mm by size, continues processing; After continuing to machine to contact aluminium liquid part, use the part of prepared Chinese ink blacking contact aluminium liquid, and dry; Adopt mechanical mix techniques the cermet powder prepared in proportion to be put into three-dimensional meal mixer and fully mix 2 hours, the chemical composition mass percent of cermet powder is: C0.1%, Al1.2%, Si0.7%, Cr25%, Co57%, Yb2.3%, W4.3%, surplus is Fe; Be fixed on by spreader on high-power semiconductor laser machining tool, drive spreader to rotate by chuck, adopt pneumatic mode toward the powder feeding of spreader blacking part, powder layer thickness is 1.2mm; The high-energy light beam utilizing high power semiconductor lasers to export, the cermet powder put in place is carried in scanning, semiconductor laser power P=2600W, rectangular light spot 2 × 8mm, overlapping rate 40%, scan velocity V=520mm/min, there is quick metallurgical reaction in the substrate surface metal making cermet powder contact aluminium liquid part with spreader, obtain the thick high temperature corrosion and wear resistance alloy enhanced layer of uniform 1.0mm, stress relief annealing is carried out to the spreader after above-mentioned laser melting coating, temperature is 500 DEG C, be incubated 4 hours, then furnace cooling; Adopt digital controlled lathe to carry out precision work to spreader cladding part again, cut cladding layer 0.5mm, form the thick alloy enhanced layer of 0.5mm at spreader contact aluminium liquid part surface.
Claims (1)
1. a preparation method for laser melting coating strengthening spreader, is characterized in that:
(1) common middle low-carbon alloy structural steel bar is processed by spreader drawing, part for noncontact aluminium liquid does not carry out any process, the part of contact aluminium liquid is reduced 0.5mm by size and continues processing, after machining, use the part of prepared Chinese ink blacking contact aluminium liquid, and dry;
(2) preparing metal ceramal powder, the chemical composition mass percent of described cermet powder is: C0.1 ~ 0.35%, Al0.6 ~ 1.2%, Si0.7 ~ 0.9%, Cr25 ~ 29%, Co55 ~ 62%, Yb2.1 ~ 2.8%, W4.3 ~ 4.9%, surplus are Fe, and the granularity of its cermet powder is 120 ~ 325 orders;
(3) with three-dimensional meal mixer, above-mentioned cermet powder is mixed 2 hours, mix;
(4) be fixed on high-power semiconductor laser machining tool by the above-mentioned spreader processed, drive spreader to rotate by chuck, adopt pneumatic or gravity mode toward the powder feeding of spreader blacking part, powder layer thickness is 1.2mm;
(5) the high-energy light beam utilizing high power semiconductor lasers to export, the cermet powder put in place is carried in scanning, semiconductor laser power P=1000 ~ 3800W, rectangular light spot 2 × 8mm, overlapping rate 30 ~ 50%, scan velocity V=300 ~ 720mm/min, there is quick metallurgical reaction in the substrate surface metal making cermet powder contact aluminium liquid part with spreader, obtains the thick high temperature corrosion and wear resistance alloy enhanced layer of uniform 1.0mm;
(6) carry out stress relief annealing to the spreader after above-mentioned laser melting coating, temperature is 300 ~ 500 DEG C, is incubated 2 ~ 4 hours, then furnace cooling;
(7) digital controlled lathe is adopted to carry out precision work to the spreader cladding part after above-mentioned anneal, cut cladding layer 0.5mm, the thick alloy enhanced layer of 0.5mm is formed at spreader contact aluminium liquid part surface, and alloy strengthening layer carries out surface quality and form and position tolerance inspection, be delivered for use after qualified, cladding is repeated to the product that there is surface imperfection, then precision work.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110396689A (en) * | 2019-08-02 | 2019-11-01 | 燕山大学 | A kind of laser melting coating strengthens the preparation method of Centrifugal rolling |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735090A (en) * | 2017-03-28 | 2017-05-31 | 中信戴卡股份有限公司 | Improved casting hub mold spreader and manufacturing process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997004914A1 (en) * | 1995-07-28 | 1997-02-13 | Commonwealth Scientific And Industrial Research Organisation | Pulsed laser cladding arrangement |
| CN101994114A (en) * | 2009-08-24 | 2011-03-30 | 沈阳大陆激光成套设备有限公司 | Laser cladding wear-resisting and heat fatigue-resisting alloy coating process for manufacturing hot rolled seamless steel tube rolling mill retained mandrel |
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2013
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997004914A1 (en) * | 1995-07-28 | 1997-02-13 | Commonwealth Scientific And Industrial Research Organisation | Pulsed laser cladding arrangement |
| CN101994114A (en) * | 2009-08-24 | 2011-03-30 | 沈阳大陆激光成套设备有限公司 | Laser cladding wear-resisting and heat fatigue-resisting alloy coating process for manufacturing hot rolled seamless steel tube rolling mill retained mandrel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110396689A (en) * | 2019-08-02 | 2019-11-01 | 燕山大学 | A kind of laser melting coating strengthens the preparation method of Centrifugal rolling |
| CN110396689B (en) * | 2019-08-02 | 2020-05-19 | 燕山大学 | Preparation method of laser cladding reinforced centrifugal roller |
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